Micro-plasticshave occupied almost every part of the planet today, including the-组卷网

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Micro-plastics have occupied almost every part of the planet today, including the most distant reaches.

The Arctic is far from clean, though it s rarely stepped in by visitors. Melanie Bergmann, a marine ecologist (海洋生态学家) and her colleagues had been studying plastics on the Arctic seafloor since 2002. In deep sea, they found about 6,0000 particles (微粒) in every 2.2 pounds of mud. In sea ice, there were as much as 12,000 pieces per 34 ounces of melted ice.

Scientists measured micro-plastics in snow from this distant location and found a lot, which could only have caught rides on the wind. The study raises concerns about the pollution that micro-plastics brought to the air, bringing a health risk to people and animals that breathe them in. But they are less worried about the threat that breathed-in pollutants have to wildlife than about polluted snow going into water.

The science on the health effects of micro-plastics is still going on.“For human health, we now now very little," says micro-plastics researcher Chelsea Rochman, “There is a lot of concern. For wildlife, we know that micro-plastics may go into every level of the food chain." Laboratory studies find some physical and chemical effects from micro-plastics, but the findings vary by the plastic type, shape experiments will be carried out soon with use of equipment if financial support approves."

Even worse is the threat from airborne micro-plastics in the area---too small to be noticed and may actually enter cells. Research on that also has been done and it could be a bigger problem, according to Rochman.

【小题1】What can you learn from the data in Paragraph 2?

A．Visitors rarely step into the Arctic.

B．Micro-plastics threaten the human beings.

C．Micro- plastics are everywhere in the world.

D．The Arctic suffers serious micro-plastics pollution.

【小题2】What makes the scientists worry most?

A．Wildlife's threat by micro-pollutants.

B．Human beings breathing micro-plastics in.

C．Micro-plastics entering the water ecosystem.

D．Micro-plastics pollution worsening global warming.

【小题3】What will the following paragraphs talk about?

A．Damage of micro-plastics to health.